简正波干涉可以引起声场的水平纵向相关下降,从而降低大孔径阵列信号处理的增益。基于声场的波导不变性,提出了信道中具有一定纵向间隔的两点的频率响应函数之间的线性相位关系。利用该线性相位关系,提出了一种适用于声源频谱缓变条件下提高声场水平纵向相关的频移补偿方法。浅海声学实验结果表明,该方法能使实验中水平阵接收信号的空间相关得到显著提高。 Simple normal-wave interference can cause a horizontal longitudinal correlation reduction of the sound field, thereby reducing the gain of the signal processing for the large aperture array. Based on the waveguide invariance of the sound field, a linear phase relationship between two frequency response functions with a certain longitudinal spacing in the channel is proposed. Using this linear phase relationship, a frequency-shift compensation method is proposed to improve the longitudinal correlation of the sound field under the condition of slowly changing sound source spectrum. The experimental results of shallow sea acoustic experiments show that this method can significantly improve the spatial correlation of the horizontal array received signals in the experiment.